---
cve: "CVE-2026-55184"
severity: "LOW"
cvss: 3.5
epss: ""
vendor: "espocrm"
kev: false
exploited: false
published: "2026-10-15 15:17:35"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-10-23T05:05:03+02:00"
---

# CVE-2026-55184

> 3.5 LOW · 🧪 PoC

## Beschreibung

EspoCRM is an open source customer relationship management application. Prior to 9.3.9, a user with Email Template or PDF Template edit permission can store crafted HTML that bypasses moderateSanitizeHtml(). When another user opens the template in edit mode and clientCspDisabled is true, the stored payload executes and can hijack the user's session. This issue is fixed in version 9.3.9.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2026-10-15 15:46:21
- CNA-CVSS: **3.5** (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Schwachstellen-Klasse

- **CWE-79** — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

## Angriffsmuster (CAPEC)

- [CAPEC-63 — Cross-Site Scripting (XSS)](https://capec.mitre.org/data/definitions/63.html) _(Severity: Very High)_
- [CAPEC-85 — AJAX Footprinting](https://capec.mitre.org/data/definitions/85.html) _(Severity: Low)_
- [CAPEC-209 — XSS Using MIME Type Mismatch](https://capec.mitre.org/data/definitions/209.html) _(Severity: Medium)_
- [CAPEC-588 — DOM-Based XSS](https://capec.mitre.org/data/definitions/588.html) _(Severity: Very High)_
- [CAPEC-591 — Reflected XSS](https://capec.mitre.org/data/definitions/591.html) _(Severity: Very High)_
- [CAPEC-592 — Stored XSS](https://capec.mitre.org/data/definitions/592.html) _(Severity: Very High)_

## Patch verfügbar (OSV)

- 07653eb9be71f2663a2e2818647f2729433ebd34 (Commit)
- 67223bfb82338c030f38dac03f12c73b7b3d760f (Commit)

## Referenzen

- <https://github.com/espocrm/espocrm/security/advisories/GHSA-x5p5-8mxj-9wv6>
- <https://github.com/espocrm/espocrm/commit/67223bfb82338c030f38dac03f12c73b7b3d760f>
- <https://github.com/espocrm/espocrm/releases/tag/9.3.9>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-55184/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_